PMID- 18845325 OWN - NLM STAT- MEDLINE DCOM- 20081210 LR - 20141120 IS - 1097-6825 (Electronic) IS - 0091-6749 (Linking) VI - 122 IP - 5 DP - 2008 Nov TI - Aberrant function of peripheral blood myeloid and plasmacytoid dendritic cells in atopic dermatitis patients. PG - 969-976.e5 LID - 10.1016/j.jaci.2008.08.028 [doi] AB - BACKGROUND: Dendritic cells (DCs) can act both as innate cells in host defense and as antigen-presenting cells for naive T cells in adaptive immunity. These functions, among others, are determined by the level of production of particular cytokines. Atopic dermatitis (AD) is a chronic inflammatory skin disorder characterized by an initial phase predominated by T(H)2 cytokines that switches into a second, more chronic T(H)1-dominated eczematous phase. OBJECTIVE: To assess to what extent the AD phenotype is associated with an aberrant phenotype and function of DCs. METHODS: Classic CD1c(+)/blood DC antigen (BDCA)-1(+) myeloid (m) DCs and CD304(+)/BDCA4(+) plasmacytoid (p) DCs, the natural IFN-producing cells, were isolated from peripheral blood of patients with AD and healthy controls and analyzed for their phenotype and function. RESULTS: Purified CD1c(+)/BDCA1(+) mDCs from patients with AD showed a selective and dramatic reduction of IL-12p70 and TNF-alpha release. IL-12p70 reduction was attributed to a defective expression of both IL-12p35 and IL-12p40 subunits. Accordingly, mature CD1c(+)/BDCA1(+) mDCs from patients with AD induced considerably less IFN-gamma-producing and more IL-4-producing T(H) cells compared with mDCs from healthy controls. In addition, CD304(+)/BDCA4(+) pDCs from patients with AD produced significantly lower levels of IFN-alpha compared with healthy controls. CONCLUSION: Myeloid DCs and pDCs from patients with AD show defective IL-12, TNF-alpha, and IFN-alpha production, which may contribute to increased susceptibility to infection and to the maintenance of the T(H)2 cell-mediated allergic state in patients with AD. FAU - Lebre, M Cristina AU - Lebre MC AD - Department of Cell Biology and Histology, Academic Medical Centre, University of Amsterdam, Amsterdam, The Netherlands. FAU - van Capel, Toni M M AU - van Capel TM FAU - Bos, Jan D AU - Bos JD FAU - Knol, Edward F AU - Knol EF FAU - Kapsenberg, Martien L AU - Kapsenberg ML FAU - de Jong, Esther C AU - de Jong EC LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20081009 PL - United States TA - J Allergy Clin Immunol JT - The Journal of allergy and clinical immunology JID - 1275002 RN - 0 (Antigens, CD1) RN - 0 (Antigens, Surface) RN - 0 (CD1C protein, human) RN - 0 (Cytokines) RN - 0 (Glycoproteins) SB - IM MH - Adult MH - Antigens, CD1/genetics/immunology MH - Antigens, Surface/genetics/immunology MH - Cytokines/immunology MH - Dendritic Cells/*immunology MH - Dermatitis, Atopic/genetics/*immunology MH - Female MH - Glycoproteins/genetics/immunology MH - Humans MH - Male MH - Middle Aged MH - Myeloid Cells/*immunology MH - Phenotype MH - Young Adult EDAT- 2008/10/11 09:00 MHDA- 2008/12/17 09:00 CRDT- 2008/10/11 09:00 PHST- 2008/02/05 00:00 [received] PHST- 2008/07/08 00:00 [revised] PHST- 2008/08/04 00:00 [accepted] PHST- 2008/10/11 09:00 [pubmed] PHST- 2008/12/17 09:00 [medline] PHST- 2008/10/11 09:00 [entrez] AID - S0091-6749(08)01553-4 [pii] AID - 10.1016/j.jaci.2008.08.028 [doi] PST - ppublish SO - J Allergy Clin Immunol. 2008 Nov;122(5):969-976.e5. doi: 10.1016/j.jaci.2008.08.028. Epub 2008 Oct 9.